amfh264enc
amfh264enc element encodes raw video stream into compressed H.264 bitstream via AMD AMF API.
Example launch line
gst-launch-1.0 videotestsrc num-buffers=100 ! amfh264enc ! h264parse ! mp4mux ! filesink location=encoded.mp4
Hierarchy
GObject ╰──GInitiallyUnowned ╰──GstObject ╰──GstElement ╰──GstVideoEncoder ╰──GstAmfEncoder ╰──amfh264enc
Implemented interfaces
GstPreset
Factory details
Authors: – Seungha Yang
Classification: – Codec/Encoder/Video/Hardware
Rank – primary
Plugin – amfcodec
Package – GStreamer Bad Plug-ins
Pad Templates
sink
video/x-raw(memory:D3D11Memory):
format: NV12
width: [ 128, 4096 ]
height: [ 128, 4096 ]
video/x-raw:
format: NV12
width: [ 128, 4096 ]
height: [ 128, 4096 ]
Presence – always
Direction – sink
Object type – GstPad
src
video/x-h264:
width: [ 128, 4096 ]
height: [ 128, 4096 ]
profile: { (string)main, (string)high, (string)constrained-baseline, (string)baseline }
stream-format: { (string)avc, (string)byte-stream }
alignment: au
Presence – always
Direction – src
Object type – GstPad
Properties
adapter-luid
“adapter-luid” gint64
DXGI Adapter LUID (Locally Unique Identifier) of associated GPU
Flags : Read
Default value : 0
aud
“aud” gboolean
Use AU (Access Unit) delimiter
Flags : Read / Write
Default value : true
bitrate
“bitrate” guint
Target bitrate in kbit/sec (0: USAGE default)
Flags : Read / Write
Default value : 0
cabac
“cabac” gboolean
Enable CABAC entropy coding
Flags : Read / Write
Default value : true
gop-size
“gop-size” gint
Number of pictures within a GOP (-1: USAGE default)
Flags : Read / Write
Default value : -1
max-bitrate
“max-bitrate” guint
Maximum bitrate in kbit/sec (0: USAGE default)
Flags : Read / Write
Default value : 0
max-qp
“max-qp” gint
Maximum allowed QP value (-1: USAGE default)
Flags : Read / Write
Default value : -1
min-qp
“min-qp” gint
Minimum allowed QP value (-1: USAGE default)
Flags : Read / Write
Default value : -1
qp-i
“qp-i” guint
Constant QP for I frames
Flags : Read / Write
Default value : 22
qp-p
“qp-p” guint
Constant QP for P frames
Flags : Read / Write
Default value : 22
rate-control
“rate-control” Amf-h264enc-rate-control *
Rate Control Method
Flags : Read / Write
Default value : default (-1)
ref-frames
“ref-frames” guint
Number of reference frames
Flags : Read / Write
Default value : 1
Named constants
Amf-h264enc-preset
Encoding quality presets
Members
default
(-1) – Default, depends on USAGE
balanced
(0) – Balanced
speed
(1) – Speed
quality
(2) – Quality
Since : 1.22
Amf-h264enc-rate-control
Rate control methods
Members
default
(-1) – Default, depends on Usage
cqp
(0) – Constant QP
cbr
(1) – Constant Bitrate
vbr
(2) – Peak Constrained VBR
lcvbr
(3) – Latency Constrained VBR
Since : 1.22
Amf-h264enc-usage
Encoder usages
Members
transcoding
(0) – Transcoding
ultra-low-latency
(1) – Ultra Low Latency
low-latency
(2) – Low Latency
webcam
(3) – Webcam
Since : 1.22
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